[…] External assurance seems to increase year-on-year. In the annual World Business Council for Sustainable Development´s (WBCSD) 2015 report, Reporting matters, 78 per cent of their 169 members have their report externally assured. Of course one can reason that the sample population is skewed, and indeed I would agree with that, as membership tends to consist of progressive sustainable companies, but even within this group, the trend is increasing by five percentage points in 2014 and 14 percentage points when compared to 2013. […]